Radiator.



. Patented Sept. l7, l90l. H. W. STBUSS.

RADIATOR.

- (A plicaticn filed Dec. 24, 1900.)

(No Model.)

ATTORNEYS WITNESSES:

UNITED STATES PATENT OFFICE.

HENRY WV. STRUSS, OF NEW YORK, N. Y.

RADIATOR.

SPECIFICATION forming part of Letters Patent Fla-682,649, dated September 1'7, 1901.

Application filed December 24, 1900. Serial No. 40 872. (No model.)

called, and has for its principal object to pro-' duce a construction having a large radiatingsurface for the purpose of conducting away heat.

Constructions embodying my invention find their special application in the liquid-circuit of internal-combustion engines wherein the cylinders are cooled by a liquid-circulating system. It will be obvious, however, that the principle may be applied to .refrigerat ing-machines and the like, as will be hereinafter explained.

In the accompanying drawings, Figure 1 is a plan View, more orless diagrammatic, showing my invention in its application to an automobile. Fig. 2 is a side view of a radiator embodying my invention. Fig. 3 is a section on line 3 3 of Fig. 2. Fig. 4 is asection on line 4 4 of Fig. Fig. 5 is a sectional View of a modified form of construction embodying my invention,- and Fig. 6 is a section on line 6 6 of Fig. 5. This figure also shows theline 5 5,on which the section through the casing is taken in Fig. 5.

The fundamental idea of the invention is the employment of a waved rib or ribs, either internal or external,- to afford a large radiating-surface for radiating or conducting away heat.

In the construction shown in Figs. 2, 3, and 4, a is a pipe for conducting water or other cooling fluid. This pipe is shown in the present instance as surrounded by a spiral rib b,whose outer edge is preferably straight, or substantially so, and whose inner edge is waved or undulated. In constructing this form of my invention I take a strip of metal at one edge of the strip become deeper and those at the outer edge are substantially straightened out, so that the spiral rib will have the appearance shown in Figs. 2 to 4 of the drawings. a, so as to secure the rib firmly thereto. This structure is capable of various applications,

' and in'Fig. 1 I have shown the invention as applied to an automobile. In this figure, A represents an automobile; B, the water-jacket of the internal-combustion cylinder; Qthe Water-tank; D, the water circulating pump, and o the pipes for conducting the water. In the liquid-circuit constituted by the pipes c, the pump D, the water-jacket B, and water'- reservoir 0, I interpolate one or more radi ators, as shown in Fig. 1, so that the cooling water of the circuit which has been heated by its passage around the cylinder of the in ternal-combustion engine will be cooled in its passage'through the radiator.

In Figs. 5 and 6 I have shown a modification of my invention wherein a pipe a conducts liquid and is provided internally with a rib b, whose outer edge is preferably sub- I then flow solder on the pipe stantially'straight and whose inner edge is undulated or waved, the depth of the undulations being greatest at the inner edge and tapering toward the outer edge, as shown. The construction shown in Figs. 5 and 6 is most suitable as a refrigerating device.

Having described my invention, what I claim, and desire to secure by Letters Patent,

1. In a radiator, the combination of a liquid-conduit and a rib running spirally with respect'to the axial line of said pipe and in heat-conducting communication therewith, the inneredge only of the said rib being waved, the outer portion of said rib being substantially unafiected by the undulations.

2. In a radiator, the combination of a pipe at and a rib I) wound thereon in heat-conducting communication with the outside surface of the pipe or conduit, the said rib having waves or undulations at its inner edge only.

HENRY W. STRUSS. Witnesses:

GEO. E. MORSE, Or'ro v. SoHRENK. 

